Andrew Parkinson / Red squirrel (Sciurus vulgaris) ascending a Pine tree. Lancashire, UK, October. (non-ex)

Tim Laman / Vines ascending up a rainforest tree in lowland forest, Gunung Palung National Park, Borneo, West Kalimantan, Indonesia

Merryn Thomas / Steps ascending Aït Benhaddou Kasbah UNESCO site, Morocco. November 2008.

Pete Oxford / Biologist Alexander Blanco 40 meters up a Kapok tree preparing to set a trap to catch a recently fledged seven month old wild Harpy Eagle (Harpia harpyja) chick to put a GPS transmitter on it, Amazon...

Pete Oxford / Alexander Blanco 40 meters up a Kapok tree preparing to set a trap to catch a recently fledged seven month old wild Harpy Eagle (Harpia harpyja) chick to put a GPS transmitter on it, Amazon rainforest...

Pete Oxford / Alexander Blanco preparing to ascend 40 meters up a Kapok tree to set a noose to catch a recently fledged seven month old wild Harpy Eagle (Harpia harpyja) chick, Cuyabeno Reserve, Amazon rainforest,...

Pete Oxford / Alexander Blanco 40 Meters up a Kapok tree in Harpy nest setting a trap to catch a recently fledged seven month old wild Harpy Eagle (Harpia harpyja) chick, Cuyabeno Reserve, Amazon rainforest, Ecuado...

Doug Allan / Looking down on climbers ascending Cotopaxi volcano, Ecuador